Oil pump



April 14, 1925,

O. F. DEVOLLD QIL PUMP Filed April- 24, 1925 Patented Apr. 14, 1925.

UNl'lED STATES ORIAN F. IDEVOLLD,- OF BARTLESVILLE, OKLAHOMA.

OIL PUMP.

Application filed April 24, 1923.

To all whom t may concern Be it known that I, ORIAN F. DEvoLLD, a citizen of the United States, residing at Bartlesville, in the county of Vashingt-on and State of Oklahoma, have invented certain new and useiul mprovements in Oil Pumps, ofwhich the following is a specification.

This invention relates to oil pumps and more particularly'to a pump having a single actuating piston and. a pair oi` opposed valves operated on the upstroke and downstroke respectively ot'the piston to deliver oil upwardly .through the casing.

An object of the invention is the provision of a pump consist-ing ot aV casing, barrel, piston and a pair of valves below the piston to control the 'flow of oil from the well to the casing. l

A further object is to provide means for separating sand and other foreign matter from the oil.

A further object is the provision of means for preventing the formation of a vacuum behind the piston on :its down-stroke.

In the accompanying drawings, I have shown one embodiment of the invention. In this showing:

Figure 1 is a central vertical sectional view through a well casing showing the invention applied,

Figure 2 is a horizontal sectional view on line 2-2 of Figure 1,

Figure 3 is a view similar to Figure 1 at right angles thereto,

Figure i is ahorizontal sectional `View on line L--lof Figure 1, V

Figure 5 is a similar view online 5 Figure 1, and,

Figure 6 is a horizontal sectional View through the valve casing on line 6-6 of Figure 1.

Referring to the drawings, the reference numeral l designates a Well casing of ordinary construction. A castino" 2 is secured to the lower end of the wezll casing. As shown, this casting consists of an annular member having an upper flange 3,v which is internally threaded, and adapted to be secured to the lower section of the well casing. The lower portion of the casting is provided with external threads 4, adapted to engage internal threads formed on the upper end of a tubular member 5, forming the outer casing of the pump. The lower end of this tubular member 1s internally screw- Seral No. 634,360.

` threaded and isY adapted to be secured to a tends into the oil in the bottom the well.

A cage 10 is arranged in the lower part of the bore 7, resting upon the shoulder 8. This cage is provided with packing 11 to frictionally engage the inner wall of the bore and retain it in position. The upper end of the cage is threaded to receive asubstantially similar cage 12. This cage is reta-ined iin position by similar packing 13. A valve seat lll is arranged between the two cages and is adapted to receive a ball valve 15. The cage 12 is threaded to receive a similar member 16 which is retained in position by means of packing 17. A valve seat 18 iis arranged?" between the members 12 and 16 and receives a ball valve 19. These cage members are provided with central bores 4forming a passage 2O which is controlled by the valves and 19. The upper end of this passage is closed by an upper member 21 which is provided with internal screw-threads to receive the threads formed on the upper endof the member 16. This upper member 21 is provided with a threaded socket 22 which is adapted to receive a rod (not shown) by means oi which the entire valve mechanism may be removed from the bore 7.

A working barrel 23 is threaded iuto the upper cn-d of the bore 7 and arranged within the outer casing 5. This barrel is adapted to receive a piston 24 which is provided with suitable packing 25. The upper end oit the barrel is received in a ring'26 forming a part of the casting 2 and secured to the outer ring by means of webs 27. A second ring 28 is carried by the webs and is adapted to receive a ltubular member 29, slightly greater in Idiameter than the diameter of the working barrel and arranged within the well casing. The piston is connected to a plunger rod 30 by means of a casting 31 and this plunger rod iextendsupwardly through the casing in the usual manner. It passes Vthrough a guide 32, supported by a ring 33,

secured in the upper end of the tubular meniber 29. A suitable packing gland 34; is carried by the guide and surrounds the plunger rod. Spacing lugs 35 are carried by the guide and adapted to engage the inner wall of the well easing. The tubular member 29 is =provided with openings 36 adjacent its upper end to permit passage oi oil from the spare between the tubular. member and the casing to the interior of the tubular member.

The lower end orl the tubular member, re-w ceived in the ring 28, is spaced from the top to the top ofthe well. By providing the openings 36 and the passa-ges 37 oil is permitted to iow into the interior of the tubular member 29 and the formation of a vacuuin behind the piston on its downward stroke is thus prevented.

It is to be understood that the form of of the working barrel to'provideopenings 87'- ithe.inventionlierewith shown andrdescribed Above the lower valve l5, there are pro- Avided aapai-rv of poits'or.V passages 3S-,rex-

tendingthrough the loweramember 6'Y and f rel and thecasing 5. As; shown, :this memwbeivt is: provided with openingsl21inl its top of the passages 3Q by .screwls 43.

side walls and iszloosely=lield'infposition on In oberation -the uowardmovement of the l a l f piston liftsthe .lower valve` l5 trom itsfseat, permitting oil to flowathrou-gh .the pipe 9,.

passage- 20,.passages 38 toe .fthe working barrel; On theldowvn-stroke of the p1ston,\the

pressure foreesuthe .rvalve d5 toits seat The pressure of oil fbaek:throughvtlrepas sages 38 andi20 lifts t-he upper valve 19`and=w permits the oil to f flow through the :passages "39..an-datlieopenings42= of thefmember 40 to the space 41.? The pressure ot oil causeso is to be taken as a preferred example otl the same, and that various changes inl the shape, .sizeyand arrangement of parts maybe resorted to without ,departingfrom thespirit of lthe `in fention on the scope' ot'ithefsubjoined claims. 1

Having thusfdeseribed my invention, I claim:

l. In'an oil pump, an outer casing, a `wlorkingbarrel varrangedin saidwcasing, 'az :piston lnounted in sa-idefworkingibarrel, a -member secured to -the lower. end o-said` casing, said `member being. rprovided with 1awc/entral passage reduced infsizenidj-acent its'loweiwend forming an inclined:shoulder, aval-veeage `resting on: said. shoulder, a.,..'valve seat mounted on the;topof said :eageya ballvalve adapted;toeengagewsaiduseat, a second rage securedeto said first;,cagel and surrounding,` the sai-d ball valve, a valve seat'inounted on top of :said seeond@ cage,f an upper ball valve adapted to..engage said seat, `a-cagesecured to the upper end of said second :cage and surrounding :said ,f z'upper-iy balla valve, and a inembe:r-secu1ed to fthe-i Supper 4end( ofy Isaid last `mentioned@cage and elosingr the vupper end off-said `centra-lpassage,said pump bel this membra-r4() to be.. raised and `lowered onmin-g yprovidedwith;a: :passage extendingfrom f `foreign matter fromf-th-e:oil.A 'Iheiopenings the screws 43 and` `Separates 'sands and other 42 permit the oi-l to passloutwardly intol they? `lchamber; 41; in alf-substantially .horizontal n direction, fseparating: :the -sand =tromvthe` oilv by thierdeflectionof the oilaliromrits"original path of travel. These openings;:however,-

are not essential as the provision ot ymeans 45 for raising they member 410r lfromy itsV seat lthe spacesy between the webs 27v off-.thefcast- 4.ing 2 and thence through the-outeiweasing a point between said valvefaseatsftosaid Aworkingbarrel and .being .,furtheri provided the outer end of said'centralppassage is pro-- vided with af thrleadedpopeningnifoir'- =the reception of a tool whereby-said -cages and said valves. may be removed as a unit.

In testimony whereof, Ifatixr` my .asigna- ,ture

` ORIAN F. DEVOLLD. 

